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Re: Brahmagupta
Posted:
Dec 2, 1999 1:13 PM


Here are some references related to Indian development of the series for arctan. C. T. Rajagopal, "A neglected chapter of Hindu mathematics" Scripta Mathematica 15 (1949) 201209
... and T. V. Vedamurthi, "On the Hindu proof of Gregory's series" ibid 17 (1951) 6574
... and M. S. Rangachari, "On an untapped source of medieval Keralese mathematics" Archive for History of Exact Sciences 18 (1977) 89102
S. Stein, "Strength in numbers", Wiley 1996 (The final chapter presents the Indian method for arctan x in the special case, x = 1, hence the LeibnizGregory series.)
S. Stein



